Speaking of KLX, the KLR650 needs that whole motor. It is a pretty strong runner. My 640 has flat out spanked every DR, XRL or KLR 650 I have ever ridden with. But my buddy's old KLX650 was almost as fast on acceleration then beat me on top end. At 90 mph on gravel I was glad to be on my 640 since the suspension and weight on the KLX650 are still in crap territory. But it has a pretty impressive motor. I have no idea why Kawasaki neutered it for the KLR650.
525EXC, 640 Enduro, XT200